94
Configuring Switch Clusters
How to Plan for Switch Clustering
Refer to the release notes for the list of Catalyst switches eligible for switch clustering, including which ones can be
cluster command switches and which ones can only be cluster member switches, and for the required software versions
and browser and Java plug-in configurations.
Automatic Discovery of Cluster Candidates and Members
The cluster command switch uses Cisco Discovery Protocol (CDP) to discover cluster member switches, candidate
switches, neighboring switch clusters, and edge devices across multiple VLANs and in star or cascaded topologies.
Note:
Do not disable CDP on the cluster command switch, on cluster members, or on any cluster-capable switches that
you might want a cluster command switch to discover. For more information about CDP, see
Following these connectivity guidelines ensures automatic discovery of the switch cluster, cluster candidates, connected
switch clusters, and neighboring edge devices:
Discovery Through CDP Hops, page 94
Discovery Through Non-CDP-Capable and Noncluster-Capable Devices, page 95
Discovery Through Different VLANs, page 96
Discovery Through Different Management VLANs, page 97
Discovery Through Routed Ports, page 97
Discovery of Newly Installed Switches, page 98
Discovery Through CDP Hops
By using CDP, a cluster command switch can discover switches up to seven CDP hops away (the default is three hops)
from the edge of the cluster. The edge of the cluster is where the last cluster member switches are connected to the
cluster and to candidate switches. For example, cluster member switches 9 and 10 in
are at the
edge of the cluster.
, the cluster command switch has ports assigned to VLANs 16 and 62. The CDP hop count is three.
The cluster command switch discovers switches 11, 12, 13, and 14 because they are within three hops from the edge
of the cluster. It does not discover switch 15 because it is four hops from the edge of the cluster.
Summary of Contents for IE 4000
Page 12: ...8 Configuration Overview Default Settings After Initial Switch Configuration ...
Page 52: ...48 Configuring Interfaces Monitoring and Maintaining the Interfaces ...
Page 108: ...104 Configuring Switch Clusters Additional References ...
Page 128: ...124 Performing Switch Administration Additional References ...
Page 130: ...126 Configuring PTP ...
Page 140: ...136 Configuring CIP Additional References ...
Page 146: ...142 Configuring SDM Templates Configuration Examples for Configuring SDM Templates ...
Page 192: ...188 Configuring Switch Based Authentication Additional References ...
Page 244: ...240 Configuring IEEE 802 1x Port Based Authentication Additional References ...
Page 298: ...294 Configuring VLANs Additional References ...
Page 336: ...332 Configuring STP Additional References ...
Page 408: ...404 Configuring DHCP Additional References ...
Page 450: ...446 Configuring IGMP Snooping and MVR Additional References ...
Page 490: ...486 Configuring SPAN and RSPAN Additional References ...
Page 502: ...498 Configuring Layer 2 NAT ...
Page 770: ...766 Configuring IPv6 MLD Snooping Related Documents ...
Page 930: ...926 Configuring IP Unicast Routing Related Documents ...
Page 976: ...972 Configuring Cisco IOS IP SLAs Operations Additional References ...
Page 978: ...974 Dying Gasp ...
Page 990: ...986 Configuring Enhanced Object Tracking Monitoring Enhanced Object Tracking ...
Page 994: ...990 Configuring MODBUS TCP Displaying MODBUS TCP Information ...
Page 996: ...992 Ethernet CFM ...
Page 1066: ...1062 Using an SD Card SD Card Alarms ...